General Motors might start making the CadillacELR extended-range plug-in hybrid coupe late next year for a 2014 model-year debut, GMInsideNews.com reports, citing unnamed "product development sources."

The ELR will use a powertrain similar to the one in the Chevrolet Volt, though the ELR's powertrain is expected to have a longer electric-only range than the current range of about 35 miles. ELR sales in Europe and China should follow the North American debut by about a year.

GM is hoping that the ELR will build on some recently-achieved sales momentum for the Volt, which was introduced in late 2010. The automaker sold a monthly record 2,289 Volts in March. Last month, that number dipped to 1,462 units, though that was still triple the figures from a year earlier.

Last August, GM confirmed that the ELR would be produced, and Bloomberg News reported at the time that the car would cost less than the base model Tesla Model S, which costs $57,400. GM representatives have not yet responded to a request for comment about the price and we will update this post when we hear something.

The ELR was originally known as the Converj when it was introduced as a concept vehicle at the 2009 North American Auto Show in Detroit.

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